Hose clamp



Patented @et 24, i922.

lmadt PATENT FREDERICK LOBI, OF MIDDLEBORO,.MASSACHUSETTS.

HOSE CLAMP.

Application filed July 14, 1919. Serial No. 310,640.

To all whom, it may concern. i

Be it known that I, Frinnnnreii LoBL, a subject of the Emperor of Austria, and a resident of Middleboro, in the county of Plymouth and Commonwealth of Massachusetts, have invented an Improvement in Hose Clamps, of which the following d escription, in conn-Lection with the accompanying drawings, is a specication, like characters on the drawings representing like parts.

This invention relatesto pipe or hose clamps, or shutoffs, for use upon flex- -ible hose, and its object is to provide an improved clamp having the novel features hereinafter pointed out.

Referring to the drawing of one embodiment of-my invention selected for description herein: y

Fig. l is a plan thereof;

Fig. 2, a side elevationwith the clamping member in inoperative or released position;

Fig. 3, a forward or Fig. 2 left hand view;

-F Il, an opposite end view;

Fig. 5, a vertical longitudinal section on the line 5-5 Fig. l, showing the swinging jaw however, in operative position, and

Fig. G, a similar view of a modified construction.

'Referringfirst to Figs. l to t inclusive, the clamp is shown as comprising a body l, having a base 2, and sides 3, preferably formed integrally, as from a single piece of spring metal.`

The. forward portions of the sides 3, Figs. 3 to 5, are fashioned originally somewhat higher than the rear side portions, and are then turned over and down until their ends are quite close to each other, to form pipe engaging flanges Ll-fl and adapted to engagethe pipe or hose sufficiently to prevent the clamp from sliding on the hose; Of course these Hanges may be adjusted until they engage the particular piece of hose in "use with the necessary friction to hold the clamp in position thereon.

The sides 3-3 are, intermediate Vtheir ends, provided with upwardly extended ears 5--5 in which are pivotally mounted the pintles 6 6 of the pivoted clamping or hose compressing member 7, comprising also a laterally extended jaw S adapted to swing thereon, and to compress the hose or pipe 9 between the jaw 8 of the member 7 and the bottom 2 of the body 1. In the construe tions in common use the handle of the jaw lies substantially flat against the hose when the jaws are closed. This makes it necessary to lift the handle to open the `iaw from a substantially fiat position and closely against the hose which is inconvenient. To ob'viate this difficulty the jaw 8 is' provided with handles 7 and 8a, one of which is always in substantially an upright position, so that whether the jaws are to be opened or closed, the handle for manipulating the same will be in a substantially upright position, and it remains only to move the same to the right or left to effect the desired action of the jaws.-

lllfhile fairly good results may be obtained .with a clamping member 7 provided with an offset or otherwise formed jaw or pipe engaging rib 8, as shown in Fig. 6, I have found that the friction of the rib against the hose 9, particularly when the latter is of inferior rubber and therefore rouglnand when the bose is of a rough .ribbed or corrugated surface, interferes considerably with the action of the jaw 8.

I have found however, that if the jaw 8 be provided with a roller l0, of any suitable material as metal or libre, and mounted as in'ears l1v downwardly extended. from the member 8, it facilitates very much the certainty of the clamping action of the member 8, as the roller l() is affected less by its engagement with the rough pipe surface, rolling thereon slightly when conditions are conclusive to that action and -when the rib `S would not slide.

I have found also that different pieces of hose or pipe intended to be of the same size, vary considerably in measurement, and also that in the course of time the particular piece of hose in use becomes smooth on its outer surface and loses enough of its surface material to prevent the clamp 7 closing the hose as tightly as it should and does at first. The result is that the closure made under such conditions isvnot perfectly tight and not always effective.

To remedy both of these difficulties l have conceived the novel idea. of providing the base 2, and substantially opposite the ears with a spring or yielding base or jaw l2, which may be conveniently formed from the base 2 by fashioning therefrom a tonguelike j aw which will yield to the desired eX- tent under the clamping action of the inemher 8 against the hose thereon. whenever the pressure of the roller lO makes it desirable so to do.

The tongue is prelerably made sutliciently rigid, and yet resilient, vto remain `in place under normal conditions and until considerable pressure is exerted thereon by the downward travel of the clamping member 8 against the hose 9, when t-he spring -jaw ll will yield su'tliciently to etlect a tight closure. The peculiar effectiveness ot' this clampingv member 9 on the spring jaw l2 seems to be due to the tact that'the yielding member l2 is provideil between the iforward and rear non-yielding areas 13, 14;, which are rendered so bythe sides 3-3 upwardly Aiextended therefrom.

l preifer to constructthe ears 'll and roller l0 olf such dimension `that rnorn'ia'lly when the member is pressed dowmi'ardlyiit'iwill `torce Fthe hose 9 against the `jaw l2 with sutiicient force to ller; it slightlydownward Thereafter when the hose Ahas'become smooth and relatively thin from use, 'the roller l() will still engage it with sutlicient pressure totightly close it-against the lmember l2.

The provision ol this spring -jaw `12,'also avoids the Vnecessity for bending'the clamping' member 8, which is frequently done, to

malreit longer, when-it is attempted to cause the member '8 or" whatever construction, to engage the `hose against a member or lyaw where there `is too much Iclearance 'between the Jaws.

If the attempt is Iliade to remedy this dilliculty by bending the-J- aw I8 it is almost ce1'- tain that thismembcror'thc member 'T will be so distorted and thrown out ot adjustment that it willbe rendered useless.

`in an arc described i'rom the pivot point where the member 8 swings, in order forthe compressing` member '8 "to remain in locking position and not tlylbacl or into unlocking position.

' This desired result does lnot seem-to be obtainable, so far as Vmy experiments indicate,

whenthe yelding e'tliectisiobtainel, either by ,ses

a flexible clamping member S or a mounting l'or the same, or a yielding base unless the same is between two rigid areas as herein, which supports the hose at points opposite `the `point lot' contact oit' the movable jaw therewith to insure the proper posit-ive lockfingie'tfect of the members 8 and The construction shown in Fig. 6 also provides a lpluralityiof spring jaws which may be used it desired, instead of one, particularly when the hose is -o't thick rubber and -there'itore less compressible.

Having described onefembodiment of my `invention, I claim l. A hose clamp comprising a body havinglnon-'yielding base areas, a yielding jaw between lthe areas, a swinging' jaw operatively positioned relative toithe'yieldingjaw,

Aand clamp positioning, flanges -on the `body to engage the lhose to prevent the clamp from slidinglongitudinally thereon.

Q. A h'ose clampcomprising- .a bot y having non-yielding base areas, a yielding;- jaw between #the area-s, aswinging,` jaw having` a handle substantially uprightV at all times, opposite the yieldingjaw, `and clamp `positioning flanges on the'bodytolock the clamp Vupon `thehose lto prevent its sliding longitudinally thereon.

3. A hose clampcomprising' a body havA ing la `jaw with a ltixed contact tace, and a swinging jaw with a plurality di handles,

lone `oit which is always iin substantially an upright position, and clamp positioning flanges on the body to lock the clampl'to the hose to prevent its slidingl longitudinally thereon.

el. A hose clamp comprising the body l, having a ba se Q', sides 3 and imvardl-yturned pipe engaging [langes Ll, 4 thereonto engage the pipe and prevent the clamp lfrom sliding `long'i tud inallytliereo11,ltlie "hose` compressingr member 7 `pivo'ted to the sides 3, the longitudinally extended jaw 8 ou the "member', downwardlyextended ears ll on the member 8. a roller l() mounted iin =the ears ll, a `movable aiw 12 with immovable areas 13'. lll, at leither side thereof in the @base Q, whereby lthe hose is compressed between the roller l0 and the'movable jaw l2 when the roller contacts with the hose at a point -ivitho'ut the vertical plane of the pivotol the swinging jaw 8;

In ytestimony whereof, l have signed lmy name yto this specilicittion. i

FREDERICK fLOBL. 

